For lazy people
click.
Panel at the bottom can be made with
kgPanels.
Unitframes could be anything I suggest
StUF or
Pitbull.
Buffs can probably be done with any number of addons too, looks like
Elkano Buffbars. Although I'd recommend
Raven.
Actionbars are possibly a combination of
Bartender for the bars and
Masque for the skin, but I don't know which one. Take your pick
here or
here.
Castbar looks like
Quartz, Raidframes look like
Grid, Totem stuff is
TotemTimers and cooldown thingy could be
CoolLine
Hope this helps.